Method of side welding wires



L.- S. LACHMAN'.

METHOD oF slm; WELmNG WIRES.'

'APPLICATION'.FILED IULYZ. 1920'.

1,41 65359- 1 Patentedamy-16,1922

UNITED. STATES PATENT OFFICE.

LAURENCE S. LACI1'.1V.[.LLIT,l 0F YORK; N. ASSIGNOR TO UNIVERSAL ELECTRIC WELDING COMPANY, OF NEW YORK, N. Y., A CORI(JRATION OF NEW YORK.

ME'rrIoD or SIDE WELDING WIRES.

A Application led July 12,

To all who-m 'it may concern Be itknown that I, LAURENCE S. LAGH- MAN, a'citizen of the United` States, and a resident of New York, in the county of New .IYork and State of Newv York, have invented `v certain new and useful Improvements in Methods of Side Welding Wires, of' which the following is a' specification.

My present invention relates to a method of side welding wires, that is when the 'wires In other words, the invention relates to a Amethod of welding wires 'when both parts at the place of desired union are parallel orl run in the same general direction. A

The object of the invention is to enable the welding of two wires or parts which it is desired to have disposed in the same plane by means of the electric resistance welding method.

It is-also the object to effect the welding in a simple, quick and efficient manner.

The invention consists in the process or method of side welding wires hereinafter more particularly described and then set forth in the claims.

In the accompanying drawings I illustrate more or less diagrammatically a set ofwelding dies which may be employed in practicing the invention.

Fig. 1 is aside elevation of the welding dies with the 'work as placed therein at the initial stage of theprocess.

Fig. 2 is a plan view of the lower die with the work placed thereon.v

' Fig. 3 is a view similar to Fig.l lbut shows the dies in position when they have first gripped the work between Athem and when the electric current is turned onor about to be turned on. y.

Fig. 4 is a similar vView illustrating the position of the dies and the` work atthe completion of the welding operation.'

Referring to the drawings, 'l indicates the lower die of. any suitable,` construction and 2 indicates the co-acting upper die. As is usual the lower die l is preferably stationary and the upper die is reeiprocated toward and. away from it in the welding operation by any suitable mechanism.

The dies 1 and 2 are of copper or other suitable conducting material as is usual `and form the terminals of the secondary circuit of a transformer forming part of. an electric Specification of Letters Patent. i I )atnted DIaylG, 1922,

1920. serial No. 395,590.

welding apparatus of any desired type or character. Electric" welding machines and their operation are now so generally known and understood that it is deemed 'unnecessary herein to further describe the apparatus, it being understood that the dies l and 2 form the terminals of the welding circuit and are reciprocated toward and away .from each other.. If desired the lower die p mayjbeprovided with a replaceable concontact vwith each other for a greaterv or@ less distance along their longitudinal sides.v

tactblock and the upper die `with a replaceable ycontact block 4 to permitre'ady removal and replacement by dies having dii-ferent work engaging surfaces to conform to the particularshape of the work desired to weld.

4The upper die 4 is lprovided with a shoulder 6 running transversely across the die and the lower die 3 Ais provided" with a similar shoulder 5 usually ruiming parallel with tlie shoulder 6 and spaced apart therefrom when the dies are brought together. 'This space `between the shoulders 5 and 6 forms the repository for the work to be welded.

In the initial stage of the process the work to be welded and which may consist of the "wires 7, 8 are placed on the lower die, one

of* the wires, 7, being placed against the shoulder 5 and the other wire 8 making longitudinal side contact with the wire 7 and slightly overlapping it, so that said wires and their line of contact will occup'y a common plane5 inclined to the line of pressure applied by the dies and to the planeof the Ifinished work. W The upper die 2 is then brought toward the lower dieand the vshoulder 6 engages the side of the wire' 8 indicated in Iig. 3.

Preferably `in order topositivelyk prevent any relative;lateraljmovement of the dies l and 2 whenpressureis applied to force the wires Tand 8. into' the same plane, the lower die is provided with an upwardly projecting ledge 9 provided with a wear plate 10. The `side of the upper die is provided with a wear plate ll suitably insulated there-l from and said plate 1l when the die 2 approaches the die 1 engages the side of the wear plate 10 previous to the time 4the shoulder 6 engages the wire 8. Thus any tend ency of the wires 7 and '8 to spread the dies laterally is positively prevented.

As soon as the shoulder 6 seats against the side of the wire 8' the electric circuit is closed in. the usual -way and the heating ico sure, passing an electric current transversely Vsame time current flows from one die to the other transversely through the overlapped -Wires -7 and 8. As the current softens the Work,

' diameters of the Wires 7 and 8- a certain amount of the wires 'are upset and forced together forming a Weld. As 'soon as the Wires are in the saine plane as indicated in Fig. fl the Weld is completed and the current is turned oli".

What I claim as my invention is sisting in partially overlappingA the wires longitudinally so that they Will occupy a plane including the line oi contact between theni, tliat is `inclined to the plane of the iinished Work and tothe line of welding presacro'ss the overlapped joint and applying pressure to force VtheWires into the same plane. i

2. The method of side Welding wires consisting in partially overlapping the Wires' longitudinally so that they will occupy while in contact with one another a plane including the line of contact inclined to the plane of the iinished Work, passing an electric 'current transversely across the overlapped joint .and applying pressure to force the Wires into the plane or' the finishedivorlr and at the preventing lateral spreading of the Wires.

at the place of Weld so that they will occupy a plane including the line of contact at their Leraars sidesinclined to the line of welding pressure and to the plane of theinished Work, pass` ing an electric current transversely across the overlapped lwires and applying pressure to force the Wires into the plane of the iinished Work andat the same time preventing relative sidewse movement of the Wires away from eachother. Y.

4.' The method of side Welding Wires consisting in partially overlapping the wires longitudinally in a position in which they will occupy aplane inclined to the line of Welding pressure and holding them in such A' lapped'position by Weldindiespassingan l. The method of side Welding Wires conl c 7 electric current transversely across the joint, applying pressure by vthe 'Welding dies to force the wires into .the plane of the finished Work and at thesame time preventing lateral relative displacement of the dies.

5. The method of side welding Wires consisting in gripping the Wires in overlapped side contact between Welding diesand While i.

occupying a plane passing through 'the contact inclined to the line of pressure applied by said dies, passing an electric current :from one die to the other transversely across the overlapped' 4Wires and applying pressure by said dies to force the Wires into the desired plane and complete the Weld While at the same time resisting the tendency of the Wires to displacement sidewvise or transversely to the line of applied pressure. 4

Signed at New York in the cormty of New York and State of New York"this 9th day of July A. D. 1920. 3. The method of side Welding Wires conl sisting in overlapping the sides of the Wires..

y LAURENCE s. LACHMAN; Witness: IRENE Lnrnowrrz, 

